#1 Â Nerita exuvia Â L., 1758, a more beachworn specimen than the one you posted in your previous group.

#2 Â Nerita albicilla

The rest all look like Donax species, which are very difficult to identify except for a few unusual species. Â Also, there are some small bivalves from other families that resemble Donax, so I can't guarantee that they are Donax.